PuTTY wish cmdline-any-option

summary: Command-line general `-o Name=Value' type optionclass: wish: This is a request for an enhancement.difficulty: tricky: Needs many tuits.depends: config-locationspriority: medium: This should be fixed one day.

Ability to tweak any option via something like OpenSSH's `-o
Name=Value' option. Need to think about how to deal with complex
options like colour selection. Also, some of the existing names for
options in the Registry are inappropriate - e.g., `LinuxFunctionKeys'.
Definitely dependent on wishlist item
`config-locations' - possibly
also `config-inheritance'?